Abstract: This invention relates to a fully differential non-inverting parallel amplifier for detecting biology electrical signal, including input buffer circuits, differential filter circuits, data selector, non-inverting parallel amplifying circuits and analog-digital circuits. The biology electrical signal, first impeded and converted by the input buffer circuits, and then low-pass filtered by the differential filter circuits, shall be amplified with its common mode signal rejected by passing through the data selector and non-inverting parallel amplifier circuits. At last, the amplified biology electrical signal is output by analog to digital conversion in the analog-digital circuits after its noises beyond signal high frequency band are filtered by anti-aliasing filter net. This invention, with low noise and high common mode rejection ratio, stable baseline, large signal input dynamic range, is reliable and not easy to be saturated. Furthermore, it can support mature PACE Detecting with a low cost.

Abstract: This invention relates to a high-performance DC amplifying device for bioelectrical signal collection, including the sequentially linked input protective/filter circuit, input buffer circuit, instrumentation amplification circuit, RC low-pass filter circuit, analog-digital conversion and peripheral circuit and CPU, as described as below: the input protective/filter circuit collects the bioelectrical signal and sends such signal to the input buffer circuit and then allows it pass through the instrumentation amplification circuit, RC low-pass filter circuit and analog-digital conversion and peripheral circuit in order. For such device, CPU controls the operation of analog-digital conversion and peripheral circuit.